Abstract: Method and systems control a rotational speed of a blood pump during ventricular diastole. A mechanical circulatory assist system includes a blood pump and a controller. The controller is operable to control a rotation rate of the blood pump in accordance with a first operational mode, monitor a blood flow rate through the blood pump, detect that the blood flow rate through the blood pump during ventricular diastole has decreased to or below an initiation blood flow rate, and, in response to detecting that the blood flow rate through the blood pump during ventricular diastole has decreased to or below an initiation blood flow rate, increase the rotation rate of the blood pump to prevent the blood flow rate through the blood pump during ventricular diastole from falling below a target minimum blood flow rate.

Abstract: Method and systems control a rotational speed of a blood pump during ventricular diastole. A method includes controlling a blood pump in accordance with a first segment operational mode. A controller monitors the blood flow rate through the blood pump. The controller determines, based on the blood flow rate, whether continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than a target minimum blood flow rate. In response to a determination that continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than the target minimum blood flow rate, the controller controls the rotational speed of the blood pump so that the blood flow rate through the blood pump is approximate to the target minimum blood flow rate.

Abstract: Systems and methods for evaluating blood behavior when flowing through an implantable medical device are provided. A flow loop includes the implantable medical device, and a blood reservoir configured to contain a volume of blood and to supply blood from the volume of blood to the implantable medical device. The flow loop further includes a plurality of tubing sections coupled in flow communication between the implantable medical device and the blood reservoir, the plurality of tubing sections including a least a first tubing section having a first diameter and a second tubing section having a second diameter, wherein the second diameter is smaller than the first diameter, and a flow diverter coupled in flow communication between the plurality of tubing sections and the blood reservoir, the flow diverter comprising an outlet that is configured to be positioned below a surface of the volume of blood.

Abstract: Method and systems control a rotational speed of a blood pump during ventricular diastole. A method includes controlling a blood pump in accordance with a first segment operational mode. A controller monitors the blood flow rate through the blood pump. The controller determines, based on the blood flow rate, whether continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than a target minimum blood flow rate. In response to a determination that continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than the target minimum blood flow rate, the controller controls the rotational speed of the blood pump so that the blood flow rate through the blood pump is approximate to the target minimum blood flow rate.

Abstract: Method and systems control a rotational speed of a blood pump during ventricular diastole. A method includes controlling a blood pump in accordance with a first segment operational mode. A controller monitors the blood flow rate through the blood pump. The controller determines, based on the blood flow rate, whether continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than a target minimum blood flow rate. In response to a determination that continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than the target minimum blood flow rate, the controller controls the rotational speed of the blood pump so that the blood flow rate through the blood pump is approximate to the target minimum blood flow rate.

Abstract: Systems and methods for evaluating blood behavior when flowing through an implantable medical device are provided. A flow loop includes the implantable medical device, and a blood reservoir configured to contain a volume of blood and to supply blood from the volume of blood to the implantable medical device. The flow loop further includes a plurality of tubing sections coupled in flow communication between the implantable medical device and the blood reservoir, the plurality of tubing sections including a least a first tubing section having a first diameter and a second tubing section having a second diameter, wherein the second diameter is smaller than the first diameter, and a flow diverter coupled in flow communication between the plurality of tubing sections and the blood reservoir, the flow diverter comprising an outlet that is configured to be positioned below a surface of the volume of blood.

Abstract: Method and systems control a rotational speed of a blood pump during ventricular diastole. A method includes controlling a blood pump in accordance with a first segment operational mode. A controller monitors the blood flow rate through the blood pump. The controller determines, based on the blood flow rate, whether continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than a target minimum blood flow rate. In response to a determination that continued controlling of the blood pump per the first segment operational mode would result in the blood flow rate through the blood pump being less than the target minimum blood flow rate, the controller controls the rotational speed of the blood pump so that the blood flow rate through the blood pump is approximate to the target minimum blood flow rate.